Comparison of Retinal Oxygenation and Retinal Vessel Diameters in Healthy Subjects and Patients With Diabetic Retinopathy or Retinal Vein Occlusion Between DVA and Oxymap (DVA-Oxymap)

August 29, 2018 updated by: Stefan Sacu, Medical University of Vienna

To date two different instruments are commercially available to measure retinal oxygen saturation and retinal vessel diameters: Dynamic Vessel Analyzer (DVA) and Oxymap. Retinal oxygen saturation analysis is based on spectroscopic evaluation of retinal fundus images. Up to now no data comparing both instruments for the measurement of retinal oxygen saturation and vessel diameter are available in the literature.

Study objectives: To compare retinal oxygenation and retinal vessel diameters in healthy subjects and patients with diabetic retinopathy or retinal vein occlusion between 2 commercially available systems (DVA, Oxymap T1)

Study design: Open pilot study

Study population:

30 healthy volunteers, age 18-80 years 30 type 2 diabetic patients with mild or moderate non-proliferative diabetic retinopathy, age 18-80 years 30 patients with retinal vein occlusion, age 18-80 years

Topically administered medication:

Tropicamide (Mydriaticum "Agepha"®, Agepha, Vienna, Austria), dose: 1-2 drops per study day for dilation of the pupil Oxybuprocainhydrochloride combined with sodium fluorescein (Thilorbin®, Alcon Pharma GmbH, Freiburg, Germany), dose: 1 drop in one eye for measurements of intraocular pressure Nonylacidvanillylamide combined with Nicotinic-acid--ß-butoxyethylester (Finalgon®, Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria): topical on the earlobe

Methods:

Dynamic vessel analyzer Oxymap T1 Blood pressure and pulse rate measurement Applanation tonometry Oxygen and carbon dioxide partial pressure measurement in arterialized blood from earlobe

Main outcome variables:

Difference of oxygen saturation of retinal vessels between DVA and Oxymap T1

The motive for this investigation is to compare data between 2 commercially available instruments for the measurement of retinal oxygen saturation and retinal vessel diameter in healthy subjects as well as in patients with ocular disease associated with altered retinal oxygenation. Comparative data from both systems are currently not available. Data from this study will allow the comparison of studies performed with different systems. All oxygen measurement procedures are non-invasive and painless. Hence, the risk/benefit ratio appears to be acceptable.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

20

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Austria
      • Vienna, Austria, 1090
        • Medical University of Vienna

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 80 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion criteria healthy volunteers

  • normal ophthalmic findings, ametropia < 3 dpt
  • men and women aged between 18 and 80 years

Exclusion Criteria:

Any of the following will exclude a subject from the study:

  • participation in a clinical trial in the 3 weeks preceding the study
  • symptoms of a clinically relevant illness in the 3 weeks before the first study day
  • pregnancy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: OTHER
  • Allocation: NA
  • Interventional Model: SINGLE_GROUP
  • Masking: NONE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
OTHER: Healthy subjects
healthy study subjects, age 18-80 years
Other: Dynamic Vessel Analyzer
Other: Oxymap T1

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Difference of oxygen saturation of retinal vessels between DVA and Oxymap T1
Time Frame: participants will be followed for the duration of outpatient clinic visit, an expected average of 1 days
participants will be followed for the duration of outpatient clinic visit, an expected average of 1 days

Secondary Outcome Measures

Outcome Measure
Time Frame
Difference of retinal vessel diameter between DVA and Oxymap T1
Time Frame: participants will be followed for the duration of outpatient clinic visit, an expected average of 1 days
participants will be followed for the duration of outpatient clinic visit, an expected average of 1 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Medical University of Vienna

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 2016

Primary Completion (ACTUAL)

January 3, 2017

Study Completion (ACTUAL)

February 28, 2018

Study Registration Dates

First Submitted

August 3, 2015

First Submitted That Met QC Criteria

August 7, 2015

First Posted (ESTIMATE)

August 13, 2015

Study Record Updates

Last Update Posted (ACTUAL)

August 31, 2018

Last Update Submitted That Met QC Criteria

August 29, 2018

Last Verified

August 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AUGEN-061014

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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